Under construction (Part 4)…

This should be pretty much a giveaway 🙂

(Previous clues here, here and here)…

I’ve had several people email me the correct answer or else post a comment with the correct answer.  I’ll “OK” those comments tomorrow so they appear and I’ll be at ISDC this weekend to photograph the completed model in all its glory and will post it on the blog.

Thanks for playing!